PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • For example, if a telephone number is presently unavailable, the term ???Phone??? may be followed by a blank or the text ???unavailable.??? Likewise, if an image associated with the contact, such as a picture, is unavailable, then the image display portion 460 may be blank or display a generic image, indicating no image is currently available or associated with the contact. [0056] The contact card
http://www.w3.org/ns/prov#wasQuotedFrom
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